1. A phase I study of binimetinib (MEK 162), a MEK inhibitor, plus carboplatin and pemetrexed chemotherapy in non-squamous non-small cell lung cancer
- Author
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S. Effendi, Lisa W. Le, J. Law, M. Chan, H. Albaba, K. M. Pisters, P. A. Bradbury, S. Gill, Natasha B. Leighl, J. Rothenstein, Tong Zhang, U. Zurawska, Dianne Zawisza, M. Trinkaus, S. Arif, Tracey L. Stockley, Donna M. Graham, Andrea S. Fung, M. Sawczak, and Eric X. Chen
- Subjects
0301 basic medicine ,Pulmonary and Respiratory Medicine ,Neuroblastoma RAS viral oncogene homolog ,Oncology ,Cancer Research ,medicine.medical_specialty ,Lung Neoplasms ,Pemetrexed ,medicine.disease_cause ,Carboplatin ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Internal medicine ,Carcinoma, Non-Small-Cell Lung ,Antineoplastic Combined Chemotherapy Protocols ,medicine ,Humans ,Progression-free survival ,Lung cancer ,Mitogen-Activated Protein Kinase Kinases ,business.industry ,MEK inhibitor ,Binimetinib ,medicine.disease ,030104 developmental biology ,Treatment Outcome ,chemistry ,030220 oncology & carcinogenesis ,Benzimidazoles ,KRAS ,business ,medicine.drug - Abstract
Introduction MEK inhibition is a potential therapeutic strategy in non-small cell lung cancer (NSCLC). This phase I study evaluates the MEK inhibitor binimetinib plus carboplatin and pemetrexed in stage IV non-squamous NSCLC patients (NCT02185690). Methods A standard 3 + 3 dose-escalation design was used. Binimetinib 30 mg BID (dose level 1 [DL1]) or 45 mg BID (dose level 2 [DL2]) was given with standard doses of carboplatin and pemetrexed using an intermittent dosing schedule. The primary outcome was determination of the recommended phase II dose (RP2D) and safety of binimetinib. Secondary outcomes included efficacy, pharmacokinetics, and an exploratory analysis of response based on mutation subtype. Results Thirteen patients (6 DL1, 7 DL2) were enrolled: 7 KRAS, 5 EGFR, and 1 NRAS mutation. The RP2D was binimetinib 30 mg BID. Eight patients (61.5%) had grade 3/4 adverse events, with dose limiting toxicities in 2 patients at DL2. Twelve patients were evaluated for response, with an investigator-assessed objective response rate (ORR) of 50% (95% CI 21.1%-78.9%; ORR 33.3% by independent-review, IR), and disease control rate 83.3% (95% CI 51.6%-97.9%). Median progression free survival (PFS) was 4.5 months (95% CI 2.6 months–NA), with a 6-month and 12-month PFS rate of 38.5% (95% CI 19.3%-76.5%) and 25.6% (95% CI 8.9%-73.6%), respectively. In an exploratory analysis, KRAS/NRAS-mutated patients had an ORR of 62.5% (ORR 37.5% by IR) vs. 25% in KRAS/NRAS wild-type patients. In MAP2K1–mutated patients, the ORR was 42.8%. Conclusion The addition of binimetinib to carboplatin and pemetrexed appears to have manageable toxicity with evidence of activity in advanced non-squamous NSCLC.
- Published
- 2021